Managing the bandwidth of a communication session

ABSTRACT

A system includes a processor operable to identify each of a plurality of first video packets from a communication session with a first identifier designating that bandwidth is reserved on the network for the packet, and identify each of a plurality of second video packets from the communication session with a second identifier designating that bandwidth is not reserved on the network for the packet. The system further includes an interface operable to initiate transmission of the plurality of first video packets and the plurality of second video packets in the communication session.

This application is a continuation of U.S. patent application Ser. No.13/305,800 filed Nov. 29, 2011 and entitled “Managing the Bandwidth of aCommunication Session”.

TECHNICAL FIELD

The present disclosure relates generally to communication sessions, andmore particularly to managing the bandwidth of communication sessions.

BACKGROUND

Networks often support a number of network components. Network bandwidthis a limited resource, and efficient management of bandwidth allowsnetworks to support more components and/or to provide components withmore bandwidth.

BRIEF DESCRIPTION OF THE DRAWINGS

To provide a more complete understanding of the present disclosure andthe features and advantages thereof, reference is made to the followingdescription taken in conjunction with the accompanying drawings, inwhich:

FIG. 1 is a block diagram illustrating an example of a system formanaging the bandwidth of a communication session;

FIG. 2 is a diagram illustrating details of managing the bandwidth of acommunication session with the system of FIG. 1;

FIG. 3 is a flowchart illustrating example steps associated with thesystem of FIG. 1; and

FIG. 4 is a diagram illustrating details associated with an embodimentthe system of FIG. 1.

DESCRIPTION OF EXAMPLE EMBODIMENTS Overview

The teachings of the present disclosure relate to a system comprising aprocessor operable to identify each of a plurality of first videopackets from a communication session with a first identifier designatingthat bandwidth is reserved on the network for the packet, and toidentify each of a plurality of second video packets from thecommunication session with a second identifier designating thatbandwidth is not reserved on the network for the packet. The systemfurther comprises an interface operable to initiate transmission of theplurality of first video packets and the plurality of second videopackets in the communication session.

Description

FIG. 1 is a block diagram illustrating an example of a system 100 formanaging the bandwidth of a communication session. System 100 includesnetwork 102, session manager module 110, one or more routers 120, andone or more intelligent endpoints 130. System 100 may further includeone or more of non-intelligent endpoints 140, intelligent nodes 150, andenforcement module 160. Components of system 100 may include one or moreof a processor, a memory, a database, an interface, and logic.

A processor represents any computing device, such as processors 112,122, 132, 142, 152, and 162, configured to control the operation of oneor more components of system 100. A processor may comprise one or moreprocessors and may be a programmable logic device, a microcontroller, amicroprocessor, any suitable processing device, or any suitablecombination of the preceding. A processor includes any hardware and/orsoftware that operates to control and process information received by acomponent of system 100. In certain embodiments, a processorcommunicatively couples to other components of system 100, such as aninterface (e.g., interfaces 114, 124, 134, 144, 154, and 164), a memory(e.g., memories 116, 126, 136, 146, 156, and 166), or any other suitablecomponent.

A memory represents any device, such as memories 116, 126, 136, 146,156, and 166, operable to store, either permanently or temporarily,data, operational software, or other information for a processor. Memoryincludes any one or a combination of volatile or non-volatile local orremote devices suitable for storing information. For example, a memorymay include random access memory (RAM), read only memory (ROM), magneticstorage devices, optical storage devices, semiconductor storage devices,or any other suitable information storage device or a combination ofthese devices. A memory may include any suitable information for use inthe operation of component of system 100. A memory may further includesome or all of one or more databases, such as databases 118, 128, 138,148, 158, and 168.

An interface represents any device, such as interfaces 114, 124, 134,144, 154, and 164, operable to receive input, send output, process theinput and/or output, and/or performs other suitable operations for acomponent of system 100. An interface includes any port or connection,real or virtual, including any suitable hardware and/or software,including protocol conversion and data processing capabilities, tocommunicate through network 102. In certain embodiments, an interfaceincludes a user interface (e.g., physical input, graphical userinterface, touchscreen, buttons, switches, transducer, or any othersuitable method to receive input from a user).

Logic may perform the operation of any component of system 100, forexample, logic executes instructions to generate output from input.Logic may include hardware, software, and/or other logic. Logic may beencoded in one or more non-transitory, tangible media, such as acomputer-readable medium or any other suitable tangible medium, and mayperform operations when executed by a computer and/or processor. Certainlogic, such as a processor, may manage the operation of a component.

Network 102 represents any suitable network operable to facilitatecommunication between components of system 100, such as session managermodule 110, router 120, intelligent endpoint 130, non-intelligentendpoint 140, intelligent node 150, and enforcement module 160. Network102 may include any interconnecting system capable of transmittingaudio, video, electrical signals, optical signals, data, messages, orany combination of the preceding. Network 102 may include all or aportion of a public switched telephone network (PSTN), a public orprivate data network, a local area network (LAN), a metropolitan areanetwork (MAN), a wide area network (WAN), a local, regional, or globalcommunication or computer network, such as the Internet, a wireline orwireless network, an enterprise intranet, or any other suitablecommunication link, including combinations thereof, operable tofacilitate communication between the components of system 100.

Session manager module 110 represents a component operable to manage theuse of bandwidth by components on network 102. In certain embodiments,session manager module 110 communicates an allocated bandwidth amount toone or more components, such as intelligent endpoint 130 and/orintelligent node 150, representing an amount of bandwidth reserved onnetwork 102 for each of the components. Session manager module 110 mayallocate bandwidth for one or more communication sessions of acomponent. In certain embodiments, session manager module 110communicates an allocated bandwidth amount for each communicationsession from a component.

The allocated bandwidth amount provides a component with a minimumamount of bandwidth for one or more communication sessions. In certainembodiments, session manager module 110 may exchange information with acomponent to determine the amount of bandwidth to allocate to thecomponent. For example, a component may request an amount of bandwidth,and session manager module 110 may allocate that amount of bandwidth tothe component, or may counter with a different amount of bandwidth.

Session manager module 110 may communicate a maximum bandwidth amount toa component. A maximum bandwidth amount represents the maximum amount ofbandwidth on network 102 that may be used by a component for one or morecommunication sessions. That is, where an allocated bandwidth amountrepresents a bandwidth floor, below which a component will not have todrop, the maximum bandwidth amount represents a bandwidth ceiling, abovewhich a component may not rise.

A maximum bandwidth amount may be based on characteristics of componentsinvolved in the communication session. For example, a videocommunication session communicated to a component with a three inchdiagonal display may have a maximum bandwidth amount lower than a videocommunication session communicated to a component with a 50 inchdiagonal display. A maximum bandwidth amount may be based oncharacteristics of the communication session. For example a videocommunication session where changes between video frames are small(e.g., a person sitting in front of a static background) may have amaximum bandwidth amount lower than a video communication session wherechanges between video frames are large (e.g., a sporting event). Incertain embodiments, session manager module 110 includes processor 112,interface 114, memory 116, and database 118. Session manager module 110may be part of a component, such as intelligent endpoint 130 orintelligent node 150.

Router 120 represents a component operable to route data packets totheir destination on network 102. In certain embodiments, data packetsmay contain identifiers. Identifiers may be any suitable indiciareadable by network components that identify sets of data packets.Identifiers may be located in any suitable portion of a data packet, forexample, the differentiated services code point (DSCP) field of the datapacket header, a real-time transport protocol (RTP) header extension,the payload (e.g., a network abstraction layer (NAL) unit), or thetransport format. In an embodiment, a first identifier may identify datapackets that have space reserved on network 102, and a second identifiermay identify packets that do not have space reserved on network 102.Data packets identified by a first identifier may be referred to asadmitted data packets. Data packets identified by a second identifiermay be referred to as unadmitted data packets.

Router 120 may read data packets for identifiers. In an embodiment,router 120 will provide admitted packets with bandwidth regardless ofthe amount of bandwidth available on network 102. For example, if thereis insufficient bandwidth on network 102, router 120 may drop unadmittedpackets to free bandwidth for admitted packets. Router 120 may onlyroute unadmitted data packets if there is sufficient bandwidth onnetwork 102 for the admitted data packets. In certain embodiments,router 120 includes processor 122, interface 124, memory 126, anddatabase 128.

Intelligent endpoint 130 represents a component operable to identifydata packets with one or more identifiers. For example, intelligentendpoint 130 may prioritize data packets in a communication session.Intelligent endpoint 130 may identify data packets that have a highpriority as admitted to ensure that they have reserved bandwidth. Datapackets that have a lower priority may be identified as unadmitted totake advantage of available bandwidth on network 102. Intelligentendpoint 130 may utilize any number of identifiers to identify anyuseful set of data packets.

In certain embodiments intelligent endpoint 130 is operable to monitoravailable bandwidth on network 102. For example, intelligent endpoint130 may determine a specific amount of bandwidth available on network102, or may determine whether or not there is any available bandwidth onnetwork 102. In an embodiment, intelligent endpoint 130 senses availablebandwidth on network 102 by monitoring data packets from thecommunication session that are dropped by network 102. If data packetsare dropped, intelligent endpoint 130 may determine that there is noavailable bandwidth on network 102. If no data packets are dropped,intelligent endpoint 130 may determine that there is available bandwidthon network 102. By monitoring available bandwidth on network 102,intelligent endpoints 130 (and/or intelligent nodes 150) can increasethe amount of bandwidth used by a communication session when bandwidthis available, and decrease the amount of bandwidth used by acommunication session when bandwidth is not available.

In an example embodiment of operation, intelligent endpoint 130 receivesan allocated bandwidth amount representing an amount of bandwidthreserved on network 102. An allocated bandwidth amount may apply to oneor more communication sessions communicated from intelligent endpoint130 (e.g., for all communication sessions, a particular communicationsession, or a particular set of communication sessions). The allocatedbandwidth amount provides intelligent endpoint 130 with a minimum amountof bandwidth to utilize. Intelligent endpoint 130 may receive anallocated bandwidth amount from session manager module 110 or othercomponent operable to allocate network bandwidth.

In an embodiment, intelligent endpoint 130 identifies a plurality offirst data packets from a communication session with a first identifierthat designates that bandwidth is reserved on network 102 for the firstdata packets (e.g., admitted data packets). The bandwidth of admitteddata packets may be determined based on the allocated bandwidth amount,for example, the bandwidth of admitted data packets may be the allocatedbandwidth amount. In particular embodiments, the bandwidth of admitteddata packets may not exceed the allocated bandwidth amount.

In an embodiment, intelligent endpoint 130 monitors network 102 todetermine whether there is available bandwidth on network 102. Availablebandwidth represents unused bandwidth on network. Available bandwidthmay be unallocated bandwidth, or may be allocated bandwidth that is notbeing used. For example, session manager module 110 may allocate all thebandwidth of network 102 to components, however, not all components withallocated bandwidth may be communicating at the same time. Even thoughall the bandwidth on network 102 is allocated, some bandwidth may beavailable if all the allocated bandwidth is not being used. In anotherexample, session manager module 110 may not allocate all the bandwidthof network 102 and some bandwidth would be available even if allcomponents are fully utilizing their respective allocated bandwidthamounts. In certain embodiments, intelligent endpoint 130 determines anamount of bandwidth available on network 102.

In certain embodiments, intelligent endpoint 130 identifies a pluralityof second data packets from the communication session with a secondidentifier that designates that bandwidth is not reserved on network 102(e.g., unadmitted data packets). If there is no bandwidth available onnetwork 102, unadmitted data packets may be dropped to provide bandwidthfor admitted data packets. However, if there is available bandwidth onnetwork 102, unadmitted data packets may utilize the availablebandwidth. The bandwidth of unadmitted data packets in a communicationsession may be determined based on the available bandwidth on network102 (e.g., bandwidth available in excess of an allocated bandwidthamount for intelligent endpoint 130).

Intelligent endpoint 130 may adjust the bandwidth of data packets duringa communication session. For example, intelligent endpoint 130 mayadjust the communication rate and/or the size (e.g., data size) of datapackets in any suitable manner. In certain embodiments, intelligentendpoint 130 adjusts the bandwidth of video data packets by adjustingthe video frame rate, quantization (sometimes referred to as bit depthor quality), video resolution, and/or any other suitable characteristicof the data packets. In certain embodiments, intelligent endpoint 130only adjusts the bandwidth of unadmitted data packets, and does notadjust the bandwidth of admitted data packets.

Intelligent endpoint 130 may adjust the bandwidth of data packets duringa communication session based on the monitored available bandwidth onnetwork 102 (e.g., available bandwidth in excess of the allocatedbandwidth amount). For example, if intelligent endpoint 130 determinesthat there is available bandwidth on network 102, then intelligentendpoint 130 may increase the bandwidth of data packets to utilize theavailable bandwidth. If intelligent endpoint 130 determines that thereis not available bandwidth on network 102, intelligent endpoint 130 mayreduce the bandwidth of data packets to avoid data packets being lostdue to insufficient bandwidth.

Intelligent endpoint 130 may include a server, router, set-top unit(STU), computer, mobile phone, tablet, smart phone, telephone,television, or any other suitable device that may identify packets withidentifiers. In certain embodiments, intelligent endpoint 130 includesprocessor 132, interface 134, memory 136, and database 138.

In certain embodiments, system 100 further includes non-intelligentendpoints 140. Non-intelligent endpoints 140 represent endpoints thatare not operable to identify data packets with one or more identifiers,and/or adjust the bandwidth of data packets. For example, one or morenon-intelligent endpoints 140 (e.g., legacy endpoints) that do not havethe capabilities of intelligent endpoints 130 may be connected tonetwork 102. Non-intelligent endpoints 140 may include a server, router,set-top unit (STU), computer, mobile phone, tablet, smart phone,telephone, television, or any other suitable device that may identifypackets with identifiers. In certain embodiments, non-intelligentendpoint 140 includes processor 142, interface 144, memory 146, anddatabase 148.

System 100 may further include one or more intelligent nodes 150operable receive communication sessions from non-intelligent endpoints140, identify data packets from the communication sessions as admittedor unadmitted, receive allocated bandwidth amounts for non-intelligentendpoints 140, receive maximum bandwidth amounts for non-intelligentendpoints 140, adjust the bandwidth of unadmitted data packets fromcommunication sessions from non-intelligent endpoints 140, and/orprovide any other functionality of intelligent endpoint 130 forunintelligent endpoints 140. In certain embodiments, intelligent node150 includes processor 152, interface 154, memory 156, and database 158.

System 100 may include enforcement module 160. Enforcement module 160represents a component operable to enforce network policy. For example,enforcement module 160 may receive an allocated bandwidth amount and amaximum bandwidth amount for a communication session from a component,and may monitor the bandwidth of the communication session and ofadmitted packets in the communication session. If the bandwidth of thecommunication session exceeds the maximum bandwidth amount or if thebandwidth of admitted packets in the communication session exceeds theallocated bandwidth amount, enforcement module 160 may take action toprevent the component from utilizing more bandwidth than network policyallows. For example, enforcement module 160 may cause admitted packetsexceeding the allocated bandwidth amount to be dropped, or may causeunadmitted packets exceeding the maximum bandwidth amount to be dropped.Enforcement module may prevent a component from utilizing any bandwidthon network until the component adheres to network policy. Enforcementmodule may communicate instructions to a component to reduce thebandwidth of admitted data packets in a communication session and/or thecombined bandwidth of all the data packets in a communication session,or any other suitable action to prevent a component from violatingnetwork policy.

Modifications, additions, or omissions may be made to system 100. System100 may include more, fewer, or other components. Any suitable componentof system 100 may include a processor, interface, logic, memory, and/orother suitable element. While certain examples may include video datapackets, data packets may communicate any suitable data. The bandwidthof data packets may be adjusted in any suitable fashion.

FIG. 2 is a graph 200 illustrating details of managing the bandwidth ofa communication session on network 102 with the system of FIG. 1. Graph200 illustrates an example of bandwidth management on network 102.Allocated bandwidth amount 202 represents the amount of bandwidth onnetwork 102 allocated to intelligent endpoint 130. Allocated bandwidthamount 202 represents a bandwidth floor, below which intelligentendpoint 130 does not have to go. Available bandwidth 206 represents thebandwidth available to intelligent endpoint 130 on network 102.Available bandwidth 206 never decreases below allocated bandwidth amount202 because intelligent endpoint 130 always has access to at leastallocated bandwidth amount 202. Area 204 on diagram 200 depicts theavailable bandwidth to intelligent endpoint 130 in excess of allocatedbandwidth amount 202.

Maximum bandwidth amount 208 represents the maximum amount of bandwidthon network 102 that intelligent endpoint 130 may use for a communicationsession. Even if available bandwidth 206 on network 102 exceeds themaximum bandwidth amount 208, intelligent endpoint 130 is capped at themaximum bandwidth amount 208.

Available bandwidth 206 on network 102 increases from point 210 to point212. Intelligent endpoint 130 can increase the bandwidth of acommunication session as available bandwidth 206 increases. Ifintelligent endpoint 130 exceeds allocated bandwidth amount 202 toutilize available bandwidth 206, intelligent endpoint 130 may designatedata packets exceeding the allocated bandwidth amount as unadmitted. Incertain embodiments, intelligent endpoint 130 adjusts the bandwidth ofunadmitted data packets by adjusting the communication rate and/orpacket size, for example, by adjusting one or more of the frame rate,quantization, and/or video resolution. However, if intelligent endpoint130 uses more bandwidth than is available, routers 120 may dropunadmitted data packets to ensure bandwidth for admitted data packets.By only dropping unadmitted data packets, system 100 can ensure thateach intelligent endpoint 130 is able to utilize its respectiveallocated bandwidth amount 202. Additionally, by allowing unadmitteddata packets if there is available bandwidth 206, system 100 preventsavailable bandwidth 206 on network 102 from being wasted.

At point 214, available bandwidth 206 reaches maximum bandwidth amount208. Intelligent endpoint 130 may increase the bandwidth of acommunication session to maximum bandwidth amount 208, but may notexceed it. Available bandwidth 206 on network 102 decreases from point216 to point 218. At point 220, available bandwidth 206 decreases belowmaximum bandwidth amount 208. Intelligent endpoint 130 may decrease thebandwidth of the communication session such that it does not exceedavailable bandwidth 206. At point 218, there is no available bandwidth206. However, intelligent endpoint 130 may continue to utilize allocatedbandwidth amount 202 with admitted data packets for a communicationsession. In an embodiment, the bandwidth of allocated data packets isless than or equal to the allocated bandwidth amount 202.

FIG. 3 is a flowchart illustrating an example method 300 associated withthe system of FIG. 1. The method 300 begins at step 302. At step 304,intelligent endpoint 130 receives an allocated bandwidth amount fromsession manager 110 for a communication session. At step 306,intelligent endpoint 130 determines if there is available bandwidth onnetwork 102.

At step 308, intelligent endpoint 130 identifies each of a plurality offirst video packets from the communication session with a firstidentifier designating that bandwidth is reserved on network 102 for thefirst video packets (e.g., admitted data packets). In an embodiment, thebandwidth of admitted data packets is based on the allocated bandwidthamount. At step 310 intelligent endpoint 130 identifies each of aplurality of second video packets from the communication session with asecond identifier designating that bandwidth is not reserved on network102 for the second video packets (e.g., unadmitted data packets). In anembodiment, the bandwidth of unadmitted data packets is based on theavailable bandwidth on network 102 (e.g., bandwidth available in excessof the allocated bandwidth amount).

At step 312, intelligent endpoint 130 monitors the available bandwidthon network 102. If there is available bandwidth, the method moves tostep 314 and intelligent endpoint 130 increases the bandwidth ofunadmitted data packets. If there is not available bandwidth, the methodmoves to step 316 and intelligent endpoint 130 decreases the bandwidthof unadmitted data packets. In an embodiment, intelligent endpoint 130adjusts the bandwidth of unadmitted data packets by adjusting one ormore of frame rate, quantization, and video resolution.

At step 318, intelligent endpoint 130 determines whether thecommunication session has ended. If the communication session has notended, the method moves to step 308 and intelligent endpoint 130continues to monitor available bandwidth on network 102. If thecommunication session has ended, then the method ends at step 320.

Modifications, additions, or omissions may be made to method 300. Method300 may include more, fewer, or other steps. The steps of method 300 maybe performed in any suitable order, and may be performed by any suitablecomponent of system 100.

FIG. 4 is a diagram illustrating an example of adjusting the bandwidthof data packets during a communication session associated with anembodiment the system of FIG. 1. In the illustrated embodiment, the datapackets are video data packets, and the bandwidth of the communicationsession is adjusted by adjusting one or more of the video frame rate,quantization, and video resolution.

The horizontal axis of diagram 400 represents bandwidth in kilobits persecond (kb/s). Boxes 410, 430, 450, 470, and 490 depict a number ofvideo resolutions. The left edge of each box depicts the typicalbandwidth of that resolution at the lowest frame rate and quantizationlevels. The right edge of each box depicts the typical bandwidth of thatresolution at the highest frame rate and quantization levels.

Box 410 represents sub quarter common intermediate format (SQCIF)resolution. The bandwidth of SQCIF typically ranges from about 40 kb/sat the lowest frame rate and quantization levels to about 400 kb/s atthe highest quantization and frame rate levels. Box 430 representsquarter common intermediate format (QCIF) resolution. The bandwidth ofQCIF typically ranges from about 60 kb/s at the lowest frame rate andquantization levels to about 400 kb/s at the highest quantization andframe rate levels. Box 450 represents quarter video graphics array(QVGA) resolution. The bandwidth of QVGA typically ranges from about 180kb/s at the lowest frame rate and quantization levels to about 840 kb/sat the highest quantization and frame rate levels. Box 470 representscommon intermediate format (CIF) resolution. The bandwidth of CIFtypically ranges from about 200 kb/s at the lowest frame rate andquantization levels to about 1000 kb/s at the highest quantization andframe rate levels. Box 490 represents video graphics array (VGA)resolution. The bandwidth of VGA typically ranges from about 400 kb/s atthe lowest frame rate and quantization levels to about 2000 kb/s at thehighest quantization and frame rate levels.

In an embodiment, intelligent endpoint 130 has an allocated bandwidthamount of 50 kb/s for a communication session. Therefore, intelligentendpoint 130 can maintain at least SQCIF for the communication sessioneven if all available bandwidth on network 102 is used. In anembodiment, the bandwidth available to intelligent endpoint 130 onnetwork 102 rises to 170 kb/s (50 kb/s allocated+120 kb/s of availablebandwidth in excess of allocated). Intelligent endpoint 130 may detectthe rise in available bandwidth and increase the frame rate andquantization at SQCIF to take advantage of the available bandwidth.

As the bandwidth available to intelligent endpoint 130 increases,intelligent endpoint 130 may increase resolution. Changing resolutionrequires communicating a new reference frame for the new resolution,which may comprise a large amount of data. To avoid rapidly switchingbetween resolutions (referred to as fluttering), and having torepeatedly communicate new reference frames, intelligent endpoint 130may require that total bandwidth available to intelligent endpoint 130be an promotion buffer amount 432, 452, 472, and 492 greater than theminimum bandwidth for the next highest resolution. If the availablebandwidth decreases after intelligent endpoint 130 promotes resolutions,intelligent endpoint 130 has buffer of bandwidth.

In an embodiment, intelligent endpoint 130 may demote to a lowerresolution when the total bandwidth amount available is demotion bufferamount 434, 454, 474, and 494 greater than the lowest bandwidth for thecurrent resolution. The demotion buffer amounts 434, 454, 474, and 494can prevent interruptions to the communication session if totalavailable bandwidth drops below the minimum bandwidth threshold for theresolution before intelligent endpoint 130 demotes to a new lowerresolution.

Intelligent endpoint 130 may require that the total bandwidth availableto intelligent endpoint 130 be stable for a particular time periodbefore promoting to the next highest resolution, or demoting to the nextlowest resolution. Intelligent endpoint 130 can set one or more of timeperiods to reduce the risk that intelligent endpoint 130 will have torapidly change between two resolutions.

Modifications, additions, or omissions may be made to diagram 400. Whilethe illustrated embodiment was directed towards video data packets, anydata packet may be used. Any suitable characteristic of a communicationsession may be adjusted to adjust the bandwidth of the communicationsession.

Certain embodiments of the present disclosure may provide one or moretechnical advantages. In an embodiment, system 100 is able to providecomponents (e.g., intelligent endpoints 130 and/or intelligent nodes150) with a minimum bandwidth for a communication session, while stillallowing the component to utilize available bandwidth on network 102. Inparticular embodiments, system 100 allows components to adjust thebandwidth of a communication session while the communication session isin progress. In certain embodiments, system 100 allows components toutilize reserved bandwidth with admitted data packets, to utilizeunreserved, but available, bandwidth with unadmitted data packets, andto adjust the bandwidth of the unadmitted data packets by adjusting thecommunication rate and or packet size of the unadmitted data packets.

Although the present invention has been described with severalembodiments, a myriad of changes, variations, alterations,transformations, and modifications may be suggested to one skilled inthe art, and it is intended that the present invention encompass suchchanges, variations, alterations, transformations, and modifications asfall within the scope of the appended claims.

What is claimed is:
 1. A system comprising: a processor operable to:designate a plurality of first video packets from a communicationsession with a first identifier designating that bandwidth is reservedon a network for the first video packets; and designate a plurality ofsecond video packets from the communication session with a secondidentifier designating that bandwidth is not reserved on the network forthe second video packets; monitor an available bandwidth on the network;and adjust, during the communication session, based on the monitoredavailable bandwidth, a bandwidth of at least one from a set comprising:the plurality of first video packets; and the plurality of second videopackets, the bandwidth of the plurality of second video packets adjustedby adjusting at least one from a set comprising: video frame rate,quantization, and video resolution; and an interface operable toinitiate transmission of the plurality of first video packets and theplurality of second video packets in the communication session.
 2. Thesystem of claim 1, the interface further operable to receive anallocated bandwidth amount, the allocated bandwidth amount representingan amount of bandwidth reserved on the network for the plurality offirst video packets.
 3. The system of claim 1: the interface furtheroperable to receive a maximum bandwidth amount, the maximum bandwidthamount representing a maximum amount of bandwidth on the network allowedfor communication session; and the processor further operable to adjustthe bandwidth of the plurality of second video packets based on thereceived maximum bandwidth amount such that the bandwidth of thecommunication session does not exceed the maximum bandwidth amount. 4.The system of claim 1, further comprising a packet identifier located inat least one from a set comprising: a differentiated services code point(DSCP) field of the header of a data packet; a real-time transportprotocol header extension of a data packet; a payload of a data packet;and a transport format of a data packet.
 5. The system of claim 1, eachof the plurality of first video packets identified with the firstidentifier designating that bandwidth is reserved on a network for thefirst video packets; and each of the plurality of second video packetsidentified with the second identifier designating that bandwidth isreserved on a network for the second video packets.
 6. A non-transitorycomputer readable medium comprising logic, the logic, when executed by aprocessor, operable to: designate a plurality of first video packetsfrom a communication session with a first identifier designating thatbandwidth is reserved on a network for the first video packets;designate a plurality of second video packets from the communicationsession with a second identifier designating that bandwidth is notreserved on the network for the second video packets; monitor anavailable bandwidth on the network; and adjust, during the communicationsession, based on the monitored available bandwidth, a bandwidth of atleast one from a set comprising: the plurality of first video packets;and the plurality of second video packets, the bandwidth of theplurality of second video packets adjusted by adjusting at least onefrom a set comprising: video frame rate, quantization, and videoresolution; and initiate transmission of the plurality of first videopackets and the plurality of second video packets in the communicationsession.
 7. The computer readable medium of claim 6, the logic furtheroperable to receive an allocated bandwidth amount, the allocatedbandwidth amount representing an amount of bandwidth reserved on thenetwork for the plurality of first video packets.
 8. The computerreadable medium of claim 6, the logic further operable to: receive amaximum bandwidth amount, the maximum bandwidth amount representing amaximum amount of bandwidth on the network allowed for communicationsession; and adjust the bandwidth of the plurality of second videopackets based on the received maximum bandwidth amount such that thebandwidth of the communication session does not exceed the maximumbandwidth amount.
 9. The computer readable medium of claim 6, furthercomprising a packet identifier located in at least one from a setcomprising: a differentiated services code point (DSCP) field of theheader of a data packet; a real-time transport protocol header extensionof a data packet; a payload of a data packet; and a transport format ofa data packet.
 10. The computer readable medium of claim 6, each of theplurality of first video packets identified with the first identifierdesignating that bandwidth is reserved on a network for the first videopackets; and each of the plurality of second video packets identifiedwith the second identifier designating that bandwidth is reserved on anetwork for the second video packets.
 11. A method, comprising:designating, by a processor, a plurality of first video packets from acommunication session with a first identifier, the first identifierdesignating that bandwidth is reserved on a network for the first videopackets; designating, by a processor, a plurality of second videopackets from the communication session with a second identifier, thesecond identifier designating that bandwidth is not reserved on thenetwork for the second video packets; monitoring, by a processor, anavailable bandwidth on the network; and adjusting, by a processor,during the communication session, based on the monitored availablebandwidth, a bandwidth of at least one from a set comprising: theplurality of first video packets; and the plurality of second videopackets, the bandwidth of the plurality of second video packets adjustedby adjusting at least one from a set comprising: video frame rate,quantization, and video resolution; and initiating transmission of theplurality of first video packets and the plurality of second videopackets in the communication session.
 12. The method of claim 11,further comprising receiving an allocated bandwidth amount, theallocated bandwidth amount representing an amount of bandwidth reservedon the network for the plurality of first video packets.
 13. The methodof claim 11, further comprising: receiving a maximum bandwidth amount,the maximum bandwidth amount representing a maximum amount of bandwidthon the network allowed for communication session; and adjusting thebandwidth of the plurality of second video packets based on the receivedmaximum bandwidth amount such that the bandwidth of the communicationsession does not exceed the maximum bandwidth amount.
 14. The method ofclaim 11, each of the plurality of first video packets identified withthe first identifier designating that bandwidth is reserved on a networkfor the first video packets; and each of the plurality of second videopackets identified with the second identifier designating that bandwidthis reserved on a network for the second video packets.